The amazing life of Britain’s ‘oldest’ teen Hayley Okines is just like any other teenager: she loves clothes, shopping, and boy bands, and hates getting up in the morning. But she has progeria, which means her body ages eight times faster than normal, giving her the body of a 126-year-old. Her positive attitude and infectious smile have charmed millions of people through her Extraordinary People TV documentaries. Now in Young at Heart, Hayley continues her unusual life story, which began with Old Before My Time. About to turn 17, she reflects on the pains and perks of growing up with progeria – from the heartbreak of being told she will never walk again to the delight of passing her exams and starting college. Hayley considers mood swings, marriage, music, and what it’s like to be ‘famous’.